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# roundl.m4 serial 7
dnl Copyright (C) 2007, 2009-2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_ROUNDL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
dnl Persuade glibc <math.h> to declare roundl().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_CHECK_DECLS([roundl], , , [#include <math.h>])
if test "$ac_cv_have_decl_roundl" = yes; then
gl_CHECK_MATH_LIB([ROUNDL_LIBM], [x = roundl (x);])
if test "$ROUNDL_LIBM" = missing; then
REPLACE_ROUNDL=1
fi
else
HAVE_DECL_ROUNDL=0
fi
if test $HAVE_DECL_ROUNDL = 0 || test $REPLACE_ROUNDL = 1; then
AC_LIBOBJ([roundl])
AC_CHECK_DECLS([ceill, floorl], , , [#include <math.h>])
if test "$ac_cv_have_decl_floorl" = yes \
&& test "$ac_cv_have_decl_ceill" = yes; then
gl_FUNC_FLOORL_LIBS
gl_FUNC_CEILL_LIBS
if test "$FLOORL_LIBM" != '?' && test "$CEILL_LIBM" != '?'; then
AC_DEFINE([HAVE_FLOORL_AND_CEILL], [1],
[Define if the both the floorl() and ceill() functions exist.])
ROUNDL_LIBM=
dnl Append $FLOORL_LIBM to ROUNDL_LIBM, avoiding gratuitous duplicates.
case " $ROUNDL_LIBM " in
*" $FLOORL_LIBM "*) ;;
*) ROUNDL_LIBM="$ROUNDL_LIBM $FLOORL_LIBM" ;;
esac
dnl Append $CEILL_LIBM to ROUNDL_LIBM, avoiding gratuitous duplicates.
case " $ROUNDL_LIBM " in
*" $CEILL_LIBM "*) ;;
*) ROUNDL_LIBM="$ROUNDL_LIBM $CEILL_LIBM" ;;
esac
else
ROUNDL_LIBM=
fi
else
ROUNDL_LIBM=
fi
fi
AC_SUBST([ROUNDL_LIBM])
])
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